diff --git a/pitest/src/main/java/org/pitest/mutationtest/engine/gregor/mutators/EmptyObjectReturnValsMutator.java b/pitest/src/main/java/org/pitest/mutationtest/engine/gregor/mutators/EmptyObjectReturnValsMutator.java
index 0ae81c2a0..36e737aef 100644
--- a/pitest/src/main/java/org/pitest/mutationtest/engine/gregor/mutators/EmptyObjectReturnValsMutator.java
+++ b/pitest/src/main/java/org/pitest/mutationtest/engine/gregor/mutators/EmptyObjectReturnValsMutator.java
@@ -214,7 +214,7 @@ public void apply(final int opCode, final MethodVisitor mv) {
 
       @Override
       public String describe(final int opCode, final MethodInfo methodInfo) {
-        return "replaced return value with Collections.emptyList for " + methodInfo.getDescription();
+        return "replaced return value with Collections.emptySet for " + methodInfo.getDescription();
       }
     };
   }